Novel hydroxide lanthanum-modified hydroxyapatite material and preparation method and application thereof

A technology of hydroxyapatite and lanthanum hydroxide, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of low phosphate removal rate and adsorption efficiency, which have not been reported, Small adsorption capacity and other problems, to achieve the effect of no secondary pollution risk, wide application range and strong adsorption capacity

Active Publication Date: 2018-12-21
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of phosphorus removal, the dosage of materials is relatively large, the adsorption capacity is small, and the removal r

Method used

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  • Novel hydroxide lanthanum-modified hydroxyapatite material and preparation method and application thereof
  • Novel hydroxide lanthanum-modified hydroxyapatite material and preparation method and application thereof
  • Novel hydroxide lanthanum-modified hydroxyapatite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1:

[0051] 1) Add lanthanum chloride to the container, add deionized water to achieve a solid-liquid ratio of 1:80, and adjust the pH to 4.5 with a 0.075mol / L hydrochloric acid solution;

[0052] 2) Add the hydroxyapatite solution to make the mass ratio of lanthanum to calcium of the mixed solution 10:1, adjust the pH of the mixed solution to 9 with 0.2mol / L NaOH solution, and stir for 2h;

[0053] 3) Put the stirred mixed solution into an ultrasonic instrument for ultrasonic, adjust its ultrasonic intensity to 100W / m 2 Ultrasound for 4h;

[0054] 4) Continue to stir the mixed solution after ultrasound on the stirrer at a stirring rate of 200 rpm for 3.5 hours;

[0055] 5) Stop stirring and seal and age for 6h;

[0056] 6) Pour the aging solution, discard the supernatant to leave a precipitate, wash the precipitate with deionized water repeatedly until it is neutral, and filter it quickly;

[0057] 7) Put the filtered residue into a blast oven, dry at 70°C for 24h, and the...

Example Embodiment

[0064] Example 2:

[0065] 1) Add lanthanum chloride to the container, add deionized water to achieve a solid-liquid ratio of 1:100, adjust the pH to 5 with a 0.1mol / L hydrochloric acid solution;

[0066] 2) Add hydroxyapatite solution to make the mass ratio of lanthanum to calcium of the mixed solution 1:1, adjust the pH of the mixed solution to 10 with 0.1 mol / L NaOH solution, and stir for 3 hours;

[0067] 3) Put the stirred mixed solution into an ultrasonic instrument for ultrasonic, adjust the ultrasonic intensity to 200W / m 2 Ultrasound for 1h;

[0068] 4) Stir the mixed solution after ultrasound on the stirrer at a stirring rate of 150 rpm for 5 hours;

[0069] 5) Stop stirring and seal and age for 8h;

[0070] 6) Pour off the aging solution and leave the supernatant to leave a precipitate, wash the precipitate repeatedly with deionized water until it is neutral, and filter with suction;

[0071] 7) Put the filter residue obtained by suction filtration into a vacuum oven, dry at 75°...

Example Embodiment

[0077] Example 3:

[0078] 1) Add lanthanum chloride to the container, add deionized water to achieve a solid-liquid ratio of 1:120, and adjust the pH to 6 with 0.2mol / L hydrochloric acid solution;

[0079] 2) Add hydroxyapatite solution to make the mass ratio of lanthanum to calcium of the mixed solution 1:5, adjust the pH of the mixed solution to 12 with 0.075mol / L KOH solution, and stir for 4h;

[0080] 3) Put the stirred mixed solution into an ultrasonic instrument for ultrasonic, adjust its ultrasonic intensity to 250W / m 2 Ultrasound for 0.5h;

[0081] 4) Stir the mixed solution after ultrasound on the stirrer at a stirring speed of 80 rpm for 18 hours;

[0082] 5) Stop stirring and seal and age for 5h;

[0083] 6) Pour off the aging solution and leave the supernatant to leave a precipitate, wash the precipitate repeatedly with deionized water until it is neutral, and filter with suction;

[0084] 7) Put the filter residue obtained by suction filtration into a vacuum oven, dry at 85°...

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Abstract

The present invention provides a novel hydroxide lanthanum-modified hydroxyapatite material and a preparation method and application thereof. The preparation method comprises the following steps of dissolving lanthanum chloride or lanthanum oxide into an acid solution, adding hydroxyapatite, and adjusting the pH (potential of hydrogen) value of the mixed solution to the alkaline property by an alkaline solution; putting the mixed solution after stirring into an ultrasonic device, and treating by ultrasonic waves for a period of time; putting onto a stirrer, and continuing to stir for a certainperiod of time; sealing, aging, filtering, and drying, so as to obtain filter slag; roasting at high temperature, so as to obtain the novel hydroxide lanthanum-modified hydroxyapatite material. The novel hydroxide lanthanum-modified hydroxyapatite material has the characteristics that the particle size is controllable, the specific surface area is large, the hole size of the particle is large, and the loading is uniform; the material is applied to remove the phosphate radicals in wastewater, the removal rate of phosphate radicals reaches 97.5% or above, and the purpose of high-efficiency andhigh-load phosphor removal is realized.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to an adsorbent material and a method for removing phosphate in wastewater, in particular to a novel lanthanum hydroxide-modified hydroxyapatite material and its preparation method and application. Background technique [0002] Phosphorus is one of the main pollutants in urban sewage. Phosphorus is an important cause of water eutrophication. Direct discharge of phosphorus wastewater will lead to serious water pollution. In 2012, the environmental status of China in 2011 reported by the Ministry of Environmental Protection showed that the eutrophication of lakes in China was a serious problem. Among the monitored lakes, 53.8% of them reached the state of eutrophication. Eutrophication of water body will lead to foul smell of water body, reduce water transparency, consume dissolved oxygen in water body, affect water supply quality and release toxic substances. The mechanism of water...

Claims

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Application Information

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IPC IPC(8): B01J20/06C02F1/28C02F101/10
CPCB01J20/048B01J20/06B01J2220/42B01J2220/4806C02F1/281C02F2101/105
Inventor 曾桂生李仲军魏栖梧凌波马林娟黄盛
Owner NANCHANG HANGKONG UNIVERSITY
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